The Circulatory System Getting oxygen and nutrients where

Circulatory System: The Function 1. 2. To deliver oxygen and nutrients to cells To

Circulatory System: Vocabulary n Oxygenated q n Deoxygenated q n Vessels dealing with the

Circulatory System: The Parts n Heart: q n Arteries: q q n THICK vessels

Circulatory System: The Heart n Pericardium: q n Myocardium: q n Protective sac that

Circulatory System: The Heart con’t… n Atrium (pl. atria): q q q n Ventricles:

Circulatory System: Arteries n n Blood vessels that carry blood AWAY from the heart

Circulatory System: Veins n n Blood vessels that carry blood TO heart from body

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The Circulatory System Getting oxygen and nutrients where they need to be!

Circulatory System: The Function 1. 2. To deliver oxygen and nutrients to cells To remove wastes from cells and deliver to excretory organs (kidneys and lungs)

Circulatory System: Vocabulary n Oxygenated q n Deoxygenated q n Vessels dealing with the LUNGS Systemic: q n Contains little or no oxygen Pulmonary: q n Contains oxygen Vessels dealing with the BODY Coronary: q Vessels dealing with the HEART itself

Circulatory System: The Parts n Heart: q n Arteries: q q n THICK vessels that carry blood AWAY from heart TO lungs or TO body Veins: q q n Muscle that pumps blood to body AND lungs THIN vessels that carry blood TO heart FROM lungs or FROM body Capillaries: q q TINY, TINY blood vessels that connect arteries to veins GAS EXCHANGE OCCURS IN CAPILLARIES!

Circulatory System: The Heart n Pericardium: q n Myocardium: q n Protective sac that surrounds the heart Contractions pump blood through heart Septum: q Thick wall that separates the two sides of the heart

Circulatory System: The Heart con’t… n Atrium (pl. atria): q q q n Ventricles: q q q n Two UPPER chambers of the heart Right atrium receives blood from the body Left atrium receives blood from the lungs Two LOWER chambers of the heart Right ventricle receives blood from the right atrium Left ventricle receives blood from the left atrium Valves: q q Prevent “backflow” of blood Locations: n n n Between atrium and ventricle Between ventricles and major arteries Throughout blood vessels in the body (VEINS)

Circulatory System: Arteries n n Blood vessels that carry blood AWAY from the heart to body or lungs Major arteries: q AORTA: n q Carries OXYGENATED blood from LEFT VENTRICLE to the BODY PULMONARY ARTERIES: n n Carry DEOXYGENTATED blood from RIGHT VENTRICLE to LUNGS ONLY ARTERIES IN BODY THAT CARRY DEOXYGENTATED BLOOD!

Circulatory System: Veins n n Blood vessels that carry blood TO heart from body or lungs Major veins: q SUPERIOR VENA CAVA: n q INFERIOR VENA CAVA: n q Carries DEOXYGENATED blood from UPPER BODY to the RIGHT ATRIUM Carries DEOXYGENATED blood from LOWER BODY to the RIGHT ATRIUM PULMONARY VEINS: n n Carry OXYGENATED blood from the LUNGS to the LEFT ATRIUM ONLY VEINS IN BODY THAT CARRY OXYGENATED BLOOD!

Diagram of Heart and Blood Flow